Yes. Gaining control of US ICBMs and using them on US cities is the simplest and easiet option for terrorists who want to nuke US cities.
:roll:
You can be sarcastic but not realistic at all at the end. A spy (traitor) working for US and contacting the Chinese is the one who sold the atomic bomb blueprints to China some decades ago. Also, even very recently, there have been lots of US workers in key positions selling important information to other countries, this includes to "allies" like UK, Israel, etc.
This is not about gaining control of US ICBMs but it can be a case of causing errors on them. Look, the idea of a rogue nation attacking US with missiles is nuts, a complete fantasy.
To find terrorists capable to obtain an atomic nuke is more a James Bond movie than a realistic event, such is not impossible but is irrational, to send a nuke requires of great technology plus a sure headquaters location which will be detected right away as soon starts its construction.
This shield is not made to reject an attack from another country, the possibilities lean on mistakes from US missiles direction instead of coming from an Asian country. Look, US is protected by waters, this means by miles and miles of traveling in order to a missile to hit US from Asia or another part of the world.
China and Russia won't risk their own future trying to attack US with missiles. The only ones who won't risk anything are the assumed extraterestrials and they do not exist at least as enemies. So, the shield has been built as a way to prove that such a defense can be made, not so because US could be in a nuclear danger or similar from rogue nations or terrorist groups.
My first reaction when I saw the airplanes hitting the twin towers was laugh because I found out that terrorists are very smart to attack using unconventional weapons, don't you get it yet? They won't attack US with conventional arms, but they will use other methods which may include interference in the computer systems which requires of one traitor alone to create a big mess.